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TPS63002: TPS63002 quiescent current

Jevgenij Kovaliov
Prodigy 40 points
Part Number: TPS63002

Hello

I have a problem with the webench circuit of the TPS63002 I have created the circuit with a input of 2v to 5.5v and a output of 5v 200mA following the webench circuit but the circuit has a quiescent current of about 16mA does anyone know how I could reduce this?

Thank you

Matt

  • 0
    TI__Expert 5425 points

    I assume you are measuring the supply current of your circuit at no load. The device does not have a quiescent current that high. You can find details for that in the datasheet. There is an application note in the product folder as well explaining quiescent current in more detail.

    To provide recommendations for reducing the quiescent current of your circuit I would need more information, e.g. schematics, component information ..

  • 0 in reply to Juergen
    Prodigy 40 points

    Yes sorry, I was measuring the current supplied to the circuit while it was running but had no load connected.

    Ive attached a screenshot of the circuit I used from the webench software, the inductor I used is this one from farnell, it has a slightly higher resistance do you think it will be that what is creating the current drain  

    Thank you for your help

  • 0 in reply to Jevgenij Kovaliov
    TI__Expert 5425 points
    In the schematic you have set PS/SYNC high. This means power save mode is disabled which means the device is switching at nominal switching frequency causing current flowing from the input to the output and back. This current which flows through the internal switches and the inductor and the switching itself causes losses which can explain a higher input current.
  • 0 in reply to Juergen
    Prodigy 40 points
    I dident notice that, I have connected it to 0v and the consumption is much lower now 
    Thank you for your help in this matter 

    Thanks 
    Matt